System and methods for enabling simultaneous transmit and receive in the same wifi band within a device

Abstract

Disclosed herein, one embodiment of the disclosure is directed to a system, apparatus, and method for enabling simultaneous transmit and receive in the same Wi-Fi band within a device by first obtaining a first information corresponding to a first set of signals to be transmitted wirelessly by a first antenna of a first device and transmitting, by the first antenna of the first device, the first set of signals. Then, a second set of signals comprising: (a) the first set of signals transmitted by the first antenna of the first device and (b) a third set of signals transmitted by a second device different than the first device are received by a second antenna of the first device. Thereafter, a second information representing the second set of signals received by the second antenna of the first device is obtained. Last, based on the first information and the second information, a third information comprising an estimation of the third set of signals without the first set of signals is determined.

What is claimed is: 
     
       1. A network device comprising:
 a hardware processor; 
 a first radio unit communicatively coupled to a first antenna to establish a first signal pathway, the first radio unit capable to transmit a first set of signals on a first radio frequency band from the first antenna; 
 a second radio unit communicatively coupled to a second antenna to establish a second signal pathway, the second radio unit capable to perform a spectrum scan on the first radio frequency band, the second signal pathway comprising a phase shifter communicatively coupled to the second antenna and a combiner communicatively coupled to the phase shifter and the second radio unit; and 
 a coupler communicatively coupled to the first signal pathway between the first radio unit and the first antenna and an attenuator communicatively coupled to the coupler and the combiner to establish a third pathway, wherein the attenuator is to attenuate output signals from the coupler by an amount corresponding to a sampling loss associated with the coupler subtracted from an antenna isolation factor associated with the first antenna. 
 
     
     
       2. The network device of  claim 1 , further comprising:
 a persistent storage communicatively coupled to the hardware processor, the persistent storage comprising radio frequency (RF) management logic and radio frequency (RF) management logic. 
 
     
     
       3. The network device of  claim 1 , wherein the second antenna is to receive a second set of signals comprising:
 (a) the first set of signals transmitted by the first antenna of the first device; and 
 (b) a third set of signals transmitted by a second device different than the first device. 
 
     
     
       4. The network device of  claim 3 , wherein the phase shifter is to apply a phase shift to the second set of signals to generate a phase-shifted second signal set. 
     
     
       5. The network device of  claim 1 , wherein the second radio unit is capable to transmit and to receive signals on a second frequency band, different than the first frequency band. 
     
     
       6. The network device of  claim 1 , wherein the first antenna of the first radio unit is used for communicating with client devices concurrently with using the second antenna of the second radio unit for monitoring wireless data transmitted by one or more other devices. 
     
     
       7. The network device of  claim 1 , wherein the phase shifter implements a 180 degree phase shift. 
     
     
       8. A method, comprising:
 generating a first set of signals in a first radio unit communicatively coupled to a first antenna to establish a first signal pathway; 
 passing the first set of signals through an attenuator communicatively coupled to the first radio unit to generate an attenuated first signal set; 
 transmitting the first set of signals on a first radio frequency band from the first antenna; 
 receiving, by a second antenna of a second radio unit, a second set of signals comprising:
 (a) the first set of signals transmitted by the first antenna; and 
 (b) a third set of signals transmitted by a second device different than the first device; 
 
 passing the second set of signals through a phase shifter communicatively coupled to the second antenna to generate a phase-shifted second signal set; 
 combining the attenuated first signal set and the phase-shifted second signal set in a combiner communicatively coupled to the attenuator and to the phase shifter, wherein the attenuator is to attenuate output signals from the coupler by an amount corresponding to a sampling loss associated with the coupler subtracted from an antenna isolation factor associated with the first antenna. 
 
     
     
       9. The method of  claim 8 , wherein a persistent storage is communicatively coupled to the hardware processor, the persistent storage comprising radio frequency (RF) management logic and radio frequency (RF) management logic. 
     
     
       10. The method of  claim 8 , wherein the second radio unit is capable to transmit and to receive signals on a second frequency band, different than the first frequency band. 
     
     
       11. The method of  claim 8 , wherein the first antenna of the first radio unit is used for communicating with client devices concurrently with using the second antenna of the second radio unit for monitoring wireless data transmitted by one or more other devices. 
     
     
       12. The method of  claim 8 , wherein the phase shifter implements a 180 degree phase shift.